Can't get Video Calling to work as it should.


    1.  Both phones are listed as fully supported for video calling.  LG G4, S7.

      2.  Works perfectly if both phones are set for, and calls routed, via cell.  Video quality is almost like HD - even when cast to big screen via Chromecast.

    3.  However - When I set my phone for wifi calling, the video call drops after 20-30 seconds.  Get an error message.  (Can't recall exact wording.)  Can make voice calls over wifi w. no problem.  Wifi connection is 90+Mbps UP and Down.  

          I had assumed that all video calls  (since they are data) would use wifi automatically no matter how you set the preferred routing for voice calls.  That is not the case. 

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